Study on sequential extraction of polyphenol and pectin from apple peel

The new method of sequential producing polyphenol and pectin from dried apple peel was researched.The polyphenol extraction experiment showed that the polyphenol yield rate got to 18.29mg /g when apple peel were extracted with 20 times volume of 60% ethanol solution at 63℃ and 58min in ultrasonic bath, and the content of polyphenol was 52.56% purified with LX-36 absorption resin.Subsequently, extraction of pectin was performed with ion exchange resin-assisted protocol at resin content 11%, pH1.3, 2.0h, 75℃, solid-liquid ratio 1∶24 (g/mL) , and ultimately the yield of pectin got to 26.26% after ultra filtration.The sequential extraction could take full advantage of apple nutrition and have a good potential for industrial production.